Help Urgent

I previously installed Flash CS3 it was trial. i wanted to remove it i went to Add/Remove Prog. in Control Panel and could’nt find a way to remove it it was listed their but it just allowed to remove its components so i deleted its files from C:/Programs Files/Adobe… now i brought Adobe Creativity DVD and i run it to install Flash Cs3 it shows Already Installed and don’t allowa to install it… i want to install it again urgent my work is in the middle… any solution?

gotta remove the entries in the registry